 Porter was given his first chance to train by Sir Joseph Hawley, who built the Kingsclere training establishment, near Newbury, Berks.During his career Porter also trained for King George V, the Duke of Westminster, The Duke of Portland, the Earl of Crewe and Earl of Portsmouth.In his will Sir Joseph gave Porter the opportunity to buy the Kingsclere estate at a price which he could afford, and he did just that.